Category Archives: Cisco

802.1Q Trunking Between Cisco and Dell Force10 Switches

In this lab I use a Dell Force10 S25P switch [FTOS 8.4.2.6] and a Cisco C3750 switch [IOS 12.2(25)SEE3] to demonstrate 802.1Q trunking.

Posted in Cisco, Dell Force10, Force10 Networks, Labs, Networking, Protocols, Technology | Tagged , , , , , , , , , , , , , , , , , , , , , , , , , , | 17 Comments

EIGRP – Advertising a Default Route to Neighbors

In this lab I use five Cisco 7200 routers [IOS 12.4(24)T] to demonstrate how to advertise a default route to neighbors in EIGRP. Below is the network diagram for this lab.

Posted in Cisco, Labs, Networking, Protocols, Technology | Tagged , , , , , , , , | Leave a comment

Configuring eBGP Peers to Use a Loopback Interface

In this lab, I use two Cisco 3725 routers [IOS 12.4(15)T10] to configure eBGP peers using loopback interfaces. Below is the network diagram for this lab.

Posted in Cisco, Labs, Networking, Protocols, Technology | Tagged , , , , , , , , , , , , | Leave a comment

Configuring OSPF with Multiple Areas

In this lab, I use three Cisco 3725 routers [IOS 12.4(15)T10] to demonstrate how to setup OSPF with multiple Areas. Below is the network diagram for this lab.

Posted in Cisco, Labs, Networking, Protocols, Technology, Troubleshooting | Tagged , , , , , , , , , , | Leave a comment

Networking: Blocking Access to a Website via Extended Access List [Video]

This video demonstrates how to use an extended access list to prevent specific hosts from accessing a website. In this lab I use two Cisco 2811 routers [IOS 12.4(15)T1] and two Cisco 2950-24 switches [IOS 12.1(22)EA4].

Posted in Cisco, Labs, Networking, Technology | Tagged , , , , , , , , , , , | Leave a comment

EIGRP – Best Path Selection

By default EIGRP uses bandwidth and delay of the line to determine the best path to a remote network. However, if desired, EIGRP can use a composite of four metrics: bandwidth, delay, reliability, and load. Maximum transmission unit (MTU) is … Continue reading

Posted in Cisco, Labs, Networking, Protocols | Tagged , , , , , , , , , , , , , , , | Leave a comment

Setting-up Basic iBGP and eBGP on Cisco Routers

The Border Gateway Protocol (BGP) is a protocol used to make core routing decisions on the Internet. BGP is commonly mislabeled or referred to as an IP routing protocol. However, it is not a routing protocol; rather, it is a … Continue reading

Posted in Cisco, Networking, Protocols, Technology | Tagged , , , , , , , , , , , , , , , , , , , , , , , , , , | Leave a comment

EIGRP and OSPF Redistribution on Cisco Routers

This was a quick lab I threw together which I thought was pretty cool. In this lab I use five Cisco 3725 routers [IOS 12.4(15)T10] in which I have two groups of routers each on a different subnet and running … Continue reading

Posted in Cisco, Labs, Networking, Protocols, Technology | Tagged , , , , , , , , , | Leave a comment

Setup and Troubleshoot EIGRP

I discussed Enhanced Interior Gateway Routing Protocol (EIGRP) briefly in a prior blog, Load Balancing with EIGRP, however, in this lab I use two Cisco 3725 routers [IOS 12.4(15)T10] to demonstrate how to configure EIGRP; additionally, I’ll discuss some useful … Continue reading

Posted in Cisco, Labs, Networking, Protocols, Technology, Troubleshooting | Tagged , , , , , , , | Leave a comment

Configuring PVST+ on Cisco Switches

Per VLAN Spanning Tree Plus (PVST+) is a flavor of Spanning Tree Protocol (see prior blog, Default STP Behavior on Cisco Switches) which maintains a spanning tree instance for each VLAN in the network. This means certain VLAN trunks (using … Continue reading

Posted in Cisco, Labs, Networking, Protocols, Technology | Tagged , , , , , , , , , , , , , | 6 Comments